Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between havana and brt?
HAVANA (Havana) (havana) is UTC-4 and Brasilia Time (brt) is UTC-3. The difference between them is 1 hours.
Where is havana used?
HAVANA (Havana) (havana) is used in Cuba and surrounding regions. The IANA timezone identifier is America/Havana.
Where is brt used?
Brasilia Time (brt) is used in Brazil and surrounding regions. The IANA timezone identifier is America/Sao_Paulo.
How do I convert havana to brt?
Use the interactive converter above. Drag the time slider to any havana time and the brt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
Havana is 1 hour behind BRT (São Paulo). When it's noon in Havana, it's 13:00 in BRT (São Paulo).
Havana runs on America/Havana; BRT (São Paulo) runs on America/Sao_Paulo. Together they are 1 hour apart.
Mutual working hours
Both Havana and BRT (São Paulo) are simultaneously in business hours for 7 hours per day (assuming standard 9:00–17:00 working hours).
00:0006:0012:0018:0024:00
Havana
BRT (São Paulo)
Overlap (7h)
Best call times between these locations
There is a 7-hour daily window where both locations are in business hours. The 3 best slots are listed below.
09:00 Havana / 10:00 São Paulo✓ Both working
10:00 Havana / 11:00 São Paulo✓ Both working
11:00 Havana / 12:00 São Paulo✓ Both working
Working hours defined as 09:00–17:00 local time for each location.
Public holidays this year
⚡ Upcoming holidays in both locations, confirm with your contact before booking.
Havana5 holidays
Jul 25Day before the Commemoration of the Assault of the Moncada garrison
Jul 26Commemoration of the Assault of the Moncada garrison
Jul 27Day after the Commemoration of the Assault of the Moncada garrison
Oct 10Independence Day
Dec 25Christmas Day
BRT (São Paulo)7 holidays
Jul 9Constitutionalist Revolution of 1932SOON
Sep 7Independence Day
Oct 12Our Lady of Aparecida
Nov 2All Souls' Day
Nov 15Republic Proclamation Day
Havana and BRT (São Paulo) — practical scheduling
Havana (Cuba) and BRT (São Paulo) (Brazil) are 1 hours apart. With a 7-hour daily overlap in standard business hours, both teams can connect in real time without either side stretching beyond their normal workday.
💡 Practical scheduling guidelines
✅
If you are in Havana, aim for 09:00–10:00, which corresponds to 10:00–11:00 in BRT (São Paulo) — both teams are within working hours.
✅
If you are in Havana, aim for 10:00–11:00, which corresponds to 11:00–12:00 in BRT (São Paulo) — both teams are within working hours.
✅
If you are in Havana, aim for 11:00–12:00, which corresponds to 12:00–13:00 in BRT (São Paulo) — both teams are within working hours.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am Havana".
